Windshield wiper blade superstructure



FIG. 1 is a perspective view showing the top and front of the design;

FIG. 2 is a perspective showing the bottom and rear of the design;

FIG. 3 is a top view of the design;

FIG. 4 is a front view of the design; and,

FIG. 5 is a bottom view of the design. 

The ornamental design for a windshield wiper blade superstructure, as shown. 